The 182 carat Daria-i-Noor pink diamond, is part of this current nation's crown jewels, and may have come from the throne of Shah Jahan. The 60 carat Noor-ul-Ain pink diamond, also a part of this nation's crown jewels, is found in its own namesake tiara, a gift for the new empress on her marriage in 1958. This nation's crown jewels also includes the jeweled Sun Throne, which is also named he Peacock Throne because it may have been modeled on the Mughal Emperor's throne of the same name. Identify this nation which hasn't had a monarchy since its 1979 overthrow.
Iran